One of world’s thinnest semiconductor junctions forming inside a quantum material could lead to new kinds of tiny, energy-efficient electronics

 https://www.eurekalert.org/news-releases/1084659

"junction 3.3 nm thick... topological MnBi₆Te₁₀ lets electricity flow freely along its edges without resistance... infusing with antimony, electrons were not evenly spread within each repeating layer of crystal, instead clumping up in some parts/ leaving other parts with fewer electrons, creating built-in electric fields... acting like p-n junctions, highly responsive to light spintronics... future: getting to maintain evenly distributed electrons... fabricating thin films rather than large, 3D crystals to more precisely control electrons' behavior"